package com.sina.shop.api.gateway.filter;

import com.netflix.zuul.ZuulFilter;
import com.netflix.zuul.context.RequestContext;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Component;

import javax.servlet.http.HttpServletRequest;

/**
 * Created with IntelliJ IDEA.
 * Description:
 * filterType：返回一个字符串代表过滤器的类型，在zuul中定义了四种不同生命周期的过滤器类型，具体如下：
 * <p>
 * pre：路由之前
 * <p>
 * routing：路由之时
 * <p>
 * post： 路由之后
 * <p>
 * error：发送错误调用
 * <p>
 * filterOrder：过滤的顺序
 * <p>
 * shouldFilter：这里可以写逻辑判断，是否要过滤，本文true,永远过滤。
 * <p>
 * run：过滤器的具体逻辑。可用很复杂，包括查sql，nosql去判断该请求到底有没有权限访问。
 * 段浩杰   2018-01-31-13:48
 */
public class CustomZuulFilter extends ZuulFilter {

    private static Logger log = LoggerFactory.getLogger(CustomZuulFilter.class);

    @Override
    public String filterType() {
        return "pre";
    }

    @Override
    public int filterOrder() {
        return 0;
    }

    @Override
    public boolean shouldFilter() {
        return true;
    }

    @Override
    public Object run() {
        RequestContext ctx = RequestContext.getCurrentContext();
        HttpServletRequest request = ctx.getRequest();
        log.info(String.format("%s >>> %s", request.getMethod(), request.getRequestURL().toString()));
        Object accessToken = request.getParameter("token");
        /*if (accessToken == null) {
			log.warn("token is empty");
			ctx.setSendZuulResponse(false);
			ctx.setResponseStatusCode(401);
			try {
				ctx.getResponse().getWriter().write("token is empty");
			} catch (Exception e) {
			}

			return null;
		}*/
        log.info("ok");
        return null;
    }
}
